Yes yes, I was one of the original hoopy froods who knew where his towel was! Gagh! Still one of my favourite series of comedic books around. Adore the absurd abstractions on philosopy, theology and spave/time in general! Thank you, Douglas Adams, for enabling us to take a 90-degree twist on reality with these books.
"The books are described as "a trilogy in five parts", having been described as a trilogy on the release of the third book, and then a "trilogy in four parts" on the release of the fourth book. The US edition of the fifth book was originally released with the legend "The fifth book in the increasingly inaccurately named Hitchhiker's Trilogy" on the cover..."